http://bugs.winehq.org/show_bug.cgi?id=23519
--- Comment #1 from Rosanne DiMesio dimesio@earthlink.net 2010-07-05 10:54:44 --- I can reproduce the problem with the dropdown lists in the mini-toolbar closing prematurely, but it only happens sometimes. This affects all the dropdown lists in the mini-toolbar--font, font size, bullets. The problem seems somewhat more likely to occur the first time a dropdown list is clicked, and trying again immediately after the list closes seems to temporarily fix it.
But I can't reproduce the problem with the buttons; they all work fine for me, with or without overrides for riched20 and/or usp10. Tested in Word 2007 (Enterprise edition), Wine 1.2-rc6.